mirror of
https://github.com/taigrr/arduinolibs
synced 2025-01-18 04:33:12 -08:00
310 lines
41 KiB
HTML
310 lines
41 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
|
<meta name="generator" content="Doxygen 1.8.6"/>
|
|
<title>ArduinoLibs: EAX.cpp Source File</title>
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="jquery.js"></script>
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="search/search.js"></script>
|
|
<script type="text/javascript">
|
|
$(document).ready(function() { searchBox.OnSelectItem(0); });
|
|
</script>
|
|
<link href="doxygen.css" rel="stylesheet" type="text/css" />
|
|
</head>
|
|
<body>
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
|
<div id="titlearea">
|
|
<table cellspacing="0" cellpadding="0">
|
|
<tbody>
|
|
<tr style="height: 56px;">
|
|
<td style="padding-left: 0.5em;">
|
|
<div id="projectname">ArduinoLibs
|
|
</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<!-- end header part -->
|
|
<!-- Generated by Doxygen 1.8.6 -->
|
|
<script type="text/javascript">
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search');
|
|
</script>
|
|
<div id="navrow1" class="tabs">
|
|
<ul class="tablist">
|
|
<li><a href="index.html"><span>Main Page</span></a></li>
|
|
<li><a href="pages.html"><span>Related Pages</span></a></li>
|
|
<li><a href="modules.html"><span>Modules</span></a></li>
|
|
<li><a href="annotated.html"><span>Classes</span></a></li>
|
|
<li class="current"><a href="files.html"><span>Files</span></a></li>
|
|
<li>
|
|
<div id="MSearchBox" class="MSearchBoxInactive">
|
|
<span class="left">
|
|
<img id="MSearchSelect" src="search/mag_sel.png"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
alt=""/>
|
|
<input type="text" id="MSearchField" value="Search" accesskey="S"
|
|
onfocus="searchBox.OnSearchFieldFocus(true)"
|
|
onblur="searchBox.OnSearchFieldFocus(false)"
|
|
onkeyup="searchBox.OnSearchFieldChange(event)"/>
|
|
</span><span class="right">
|
|
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
|
|
</span>
|
|
</div>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div id="navrow2" class="tabs2">
|
|
<ul class="tablist">
|
|
<li><a href="files.html"><span>File List</span></a></li>
|
|
</ul>
|
|
</div>
|
|
<!-- window showing the filter options -->
|
|
<div id="MSearchSelectWindow"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
|
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Friends</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div>
|
|
|
|
<!-- iframe showing the search results (closed by default) -->
|
|
<div id="MSearchResultsWindow">
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
|
name="MSearchResults" id="MSearchResults">
|
|
</iframe>
|
|
</div>
|
|
|
|
<div id="nav-path" class="navpath">
|
|
<ul>
|
|
<li class="navelem"><a class="el" href="dir_bc0718b08fb2015b8e59c47b2805f60c.html">libraries</a></li><li class="navelem"><a class="el" href="dir_e2ce51835550ba18edf07a8311722290.html">Crypto</a></li> </ul>
|
|
</div>
|
|
</div><!-- top -->
|
|
<div class="header">
|
|
<div class="headertitle">
|
|
<div class="title">EAX.cpp</div> </div>
|
|
</div><!--header-->
|
|
<div class="contents">
|
|
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
|
|
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (C) 2015 Southern Storm Software, Pty Ltd.</span></div>
|
|
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
|
|
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span></div>
|
|
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * copy of this software and associated documentation files (the "Software"),</span></div>
|
|
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to deal in the Software without restriction, including without limitation</span></div>
|
|
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span></div>
|
|
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span></div>
|
|
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * Software is furnished to do so, subject to the following conditions:</span></div>
|
|
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
|
|
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * The above copyright notice and this permission notice shall be included</span></div>
|
|
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * in all copies or substantial portions of the Software.</span></div>
|
|
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
|
|
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS</span></div>
|
|
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
|
|
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span></div>
|
|
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
|
|
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span></div>
|
|
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span></div>
|
|
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * DEALINGS IN THE SOFTWARE.</span></div>
|
|
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div>
|
|
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
|
|
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "EAX.h"</span></div>
|
|
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "Crypto.h"</span></div>
|
|
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <string.h></span></div>
|
|
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
|
|
<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classEAXCommon.html#ae09c9df956bf87cde02ca36c26c32f79"> 43</a></span> <a class="code" href="classEAXCommon.html#ae09c9df956bf87cde02ca36c26c32f79">EAXCommon::EAXCommon</a>()</div>
|
|
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> {</div>
|
|
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  state.encPosn = 0;</div>
|
|
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  state.authMode = 0;</div>
|
|
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> }</div>
|
|
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
|
|
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> EAXCommon::~EAXCommon()</div>
|
|
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {</div>
|
|
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  clean(state);</div>
|
|
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> }</div>
|
|
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div>
|
|
<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="classEAXCommon.html#a027956913eecfa0bc760f20f3b62df29"> 54</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classEAXCommon.html#a027956913eecfa0bc760f20f3b62df29">EAXCommon::keySize</a>()<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">return</span> omac.<a class="code" href="classOMAC.html#abca82def496c6c6ab1ce5e5a958ec34a">blockCipher</a>()-><a class="code" href="classBlockCipher.html#afde6004a859e015d877eab3c37042a0f">keySize</a>();</div>
|
|
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> }</div>
|
|
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
|
|
<div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="classEAXCommon.html#abc6ccfb9338c94699458723f669513bf"> 59</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classEAXCommon.html#abc6ccfb9338c94699458723f669513bf">EAXCommon::ivSize</a>()<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Can use any size but 16 is recommended.</span></div>
|
|
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> 16;</div>
|
|
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> }</div>
|
|
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
|
|
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classEAXCommon.html#a8804341b21f752a5b8178a3bdb123fd9"> 65</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classEAXCommon.html#a8804341b21f752a5b8178a3bdb123fd9">EAXCommon::tagSize</a>()<span class="keyword"> const</span></div>
|
|
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword"></span>{</div>
|
|
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// Tags can be up to 16 bytes in length.</span></div>
|
|
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> 16;</div>
|
|
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div>
|
|
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
|
|
<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="classEAXCommon.html#af5be5115c119610abb351028263d28de"> 71</a></span> <span class="keywordtype">bool</span> <a class="code" href="classEAXCommon.html#af5be5115c119610abb351028263d28de">EAXCommon::setKey</a>(<span class="keyword">const</span> uint8_t *key, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> {</div>
|
|
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> omac.<a class="code" href="classOMAC.html#abca82def496c6c6ab1ce5e5a958ec34a">blockCipher</a>()-><a class="code" href="classBlockCipher.html#a9a05307664469777592799c8f77397c4">setKey</a>(key, len);</div>
|
|
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</div>
|
|
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
|
|
<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classEAXCommon.html#a33a5da1f210f01c3622fbf27208f3d45"> 76</a></span> <span class="keywordtype">bool</span> <a class="code" href="classEAXCommon.html#a33a5da1f210f01c3622fbf27208f3d45">EAXCommon::setIV</a>(<span class="keyword">const</span> uint8_t *iv, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> {</div>
|
|
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// Must have at least 1 byte for the IV.</span></div>
|
|
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">if</span> (!len)</div>
|
|
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
|
|
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// Hash the IV to create the initial nonce for CTR mode. Also creates B.</span></div>
|
|
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  omac.<a class="code" href="classOMAC.html#a0274138725ddf6240c030574bae3975c">initFirst</a>(state.counter);</div>
|
|
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  omac.<a class="code" href="classOMAC.html#a6692d7f37dd097fdfdd2b198aa0d9cde">update</a>(state.counter, iv, len);</div>
|
|
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  omac.<a class="code" href="classOMAC.html#ae4ccdaee764df779f7ae0c7433078b3e">finalize</a>(state.counter);</div>
|
|
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
|
|
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// The tag is initially the nonce value. Will be XOR'ed with</span></div>
|
|
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// the hash of the authenticated and encrypted data later.</span></div>
|
|
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  memcpy(state.tag, state.counter, 16);</div>
|
|
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
|
|
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// Start the hashing context for the authenticated data.</span></div>
|
|
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  omac.<a class="code" href="classOMAC.html#ad496c7d2de4f22fd4192345003e75ee5">initNext</a>(state.hash, 1);</div>
|
|
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  state.encPosn = 16;</div>
|
|
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  state.authMode = 1;</div>
|
|
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div>
|
|
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// The EAX context is ready to go.</span></div>
|
|
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> }</div>
|
|
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
|
|
<div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="classEAXCommon.html#aad2c563f749535f539b8efbd74b09099"> 100</a></span> <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#aad2c563f749535f539b8efbd74b09099">EAXCommon::encrypt</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> {</div>
|
|
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> (state.authMode)</div>
|
|
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  closeAuthData();</div>
|
|
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  encryptCTR(output, input, len);</div>
|
|
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  omac.<a class="code" href="classOMAC.html#a6692d7f37dd097fdfdd2b198aa0d9cde">update</a>(state.hash, output, len);</div>
|
|
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> }</div>
|
|
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
|
|
<div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="classEAXCommon.html#a63ce8ae45db137ec9d447216b84245c2"> 108</a></span> <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#a63ce8ae45db137ec9d447216b84245c2">EAXCommon::decrypt</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> {</div>
|
|
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span> (state.authMode)</div>
|
|
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  closeAuthData();</div>
|
|
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  omac.<a class="code" href="classOMAC.html#a6692d7f37dd097fdfdd2b198aa0d9cde">update</a>(state.hash, input, len);</div>
|
|
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  encryptCTR(output, input, len);</div>
|
|
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div>
|
|
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
|
|
<div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="classEAXCommon.html#acdf2c51fb11c068202311b5c95767db8"> 116</a></span> <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#acdf2c51fb11c068202311b5c95767db8">EAXCommon::addAuthData</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> {</div>
|
|
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span> (state.authMode)</div>
|
|
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  omac.<a class="code" href="classOMAC.html#a6692d7f37dd097fdfdd2b198aa0d9cde">update</a>(state.hash, (<span class="keyword">const</span> uint8_t *)data, len);</div>
|
|
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div>
|
|
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div>
|
|
<div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="classEAXCommon.html#ab5a61bba48561d6e7e6b8bafc51d91e3"> 122</a></span> <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#ab5a61bba48561d6e7e6b8bafc51d91e3">EAXCommon::computeTag</a>(<span class="keywordtype">void</span> *tag, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> {</div>
|
|
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  closeTag();</div>
|
|
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">if</span> (len > 16)</div>
|
|
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  len = 16;</div>
|
|
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  memcpy(tag, state.tag, len);</div>
|
|
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> }</div>
|
|
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div>
|
|
<div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="classEAXCommon.html#a72c403f52cefab57566bc5f634c1b963"> 130</a></span> <span class="keywordtype">bool</span> <a class="code" href="classEAXCommon.html#a72c403f52cefab57566bc5f634c1b963">EAXCommon::checkTag</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *tag, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> {</div>
|
|
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">// Can never match if the expected tag length is too long.</span></div>
|
|
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">if</span> (len > 16)</div>
|
|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
|
|
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// Compute the final tag and check it.</span></div>
|
|
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  closeTag();</div>
|
|
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> secure_compare(state.tag, tag, len);</div>
|
|
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> }</div>
|
|
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
|
|
<div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="classEAXCommon.html#afa88b0f589e09103e9c69ace081db0af"> 141</a></span> <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#afa88b0f589e09103e9c69ace081db0af">EAXCommon::clear</a>()</div>
|
|
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> {</div>
|
|
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  clean(state);</div>
|
|
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> }</div>
|
|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
|
|
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="keywordtype">void</span> EAXCommon::closeAuthData()</div>
|
|
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> {</div>
|
|
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// Finalise the OMAC hash and XOR it with the final tag.</span></div>
|
|
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  omac.<a class="code" href="classOMAC.html#ae4ccdaee764df779f7ae0c7433078b3e">finalize</a>(state.hash);</div>
|
|
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">for</span> (uint8_t index = 0; index < 16; ++index)</div>
|
|
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  state.tag[index] ^= state.hash[index];</div>
|
|
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  state.authMode = 0;</div>
|
|
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
|
|
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// Initialise the hashing context for the ciphertext data.</span></div>
|
|
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  omac.<a class="code" href="classOMAC.html#ad496c7d2de4f22fd4192345003e75ee5">initNext</a>(state.hash, 2);</div>
|
|
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> }</div>
|
|
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div>
|
|
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keywordtype">void</span> EAXCommon::encryptCTR(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len)</div>
|
|
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> {</div>
|
|
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">while</span> (len > 0) {</div>
|
|
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment">// Do we need to start a new block?</span></div>
|
|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">if</span> (state.encPosn == 16) {</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="comment">// Encrypt the counter to create the next keystream block.</span></div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  omac.<a class="code" href="classOMAC.html#abca82def496c6c6ab1ce5e5a958ec34a">blockCipher</a>()-><a class="code" href="classBlockCipher.html#aed0788b25f6bb2f1bd47d5a5f0c5db33">encryptBlock</a>(state.stream, state.counter);</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  state.encPosn = 0;</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// Increment the counter, taking care not to reveal</span></div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// any timing information about the starting value.</span></div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// We iterate through the entire counter region even</span></div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// if we could stop earlier because a byte is non-zero.</span></div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  uint16_t temp = 1;</div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  uint8_t index = 16;</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">while</span> (index > 0) {</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  --index;</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  temp += state.counter[index];</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  state.counter[index] = (uint8_t)temp;</div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  temp >>= 8;</div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// Encrypt/decrypt the current input block.</span></div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  uint8_t size = 16 - state.encPosn;</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">if</span> (size > len)</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  size = (uint8_t)len;</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">for</span> (uint8_t index = 0; index < size; ++index)</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  output[index] = input[index] ^ state.stream[(state.encPosn)++];</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="comment">// Move onto the next block.</span></div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  len -= size;</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  input += size;</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  output += size;</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> }</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keywordtype">void</span> EAXCommon::closeTag()</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> {</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// If we were only authenticating, then close off auth mode.</span></div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (state.authMode)</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  closeAuthData();</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="comment">// Finalise the hash over the ciphertext and XOR with the final tag.</span></div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  omac.<a class="code" href="classOMAC.html#ae4ccdaee764df779f7ae0c7433078b3e">finalize</a>(state.hash);</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">for</span> (uint8_t index = 0; index < 16; ++index)</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  state.tag[index] ^= state.hash[index];</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> }</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div>
|
|
<div class="ttc" id="classOMAC_html_ae4ccdaee764df779f7ae0c7433078b3e"><div class="ttname"><a href="classOMAC.html#ae4ccdaee764df779f7ae0c7433078b3e">OMAC::finalize</a></div><div class="ttdeci">void finalize(uint8_t omac[16])</div><div class="ttdoc">Finalises an OMAC hashing context. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8cpp_source.html#l00172">OMAC.cpp:172</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_a33a5da1f210f01c3622fbf27208f3d45"><div class="ttname"><a href="classEAXCommon.html#a33a5da1f210f01c3622fbf27208f3d45">EAXCommon::setIV</a></div><div class="ttdeci">bool setIV(const uint8_t *iv, size_t len)</div><div class="ttdoc">Sets the initialization vector to use for future encryption and decryption operations. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00076">EAX.cpp:76</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_a63ce8ae45db137ec9d447216b84245c2"><div class="ttname"><a href="classEAXCommon.html#a63ce8ae45db137ec9d447216b84245c2">EAXCommon::decrypt</a></div><div class="ttdeci">void decrypt(uint8_t *output, const uint8_t *input, size_t len)</div><div class="ttdoc">Decrypts an input buffer and writes the plaintext to an output buffer. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00108">EAX.cpp:108</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_a8804341b21f752a5b8178a3bdb123fd9"><div class="ttname"><a href="classEAXCommon.html#a8804341b21f752a5b8178a3bdb123fd9">EAXCommon::tagSize</a></div><div class="ttdeci">size_t tagSize() const </div><div class="ttdoc">Returns the size of the authentication tag. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00065">EAX.cpp:65</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_ae09c9df956bf87cde02ca36c26c32f79"><div class="ttname"><a href="classEAXCommon.html#ae09c9df956bf87cde02ca36c26c32f79">EAXCommon::EAXCommon</a></div><div class="ttdeci">EAXCommon()</div><div class="ttdoc">Constructs a new cipher in EAX mode. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00043">EAX.cpp:43</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_a72c403f52cefab57566bc5f634c1b963"><div class="ttname"><a href="classEAXCommon.html#a72c403f52cefab57566bc5f634c1b963">EAXCommon::checkTag</a></div><div class="ttdeci">bool checkTag(const void *tag, size_t len)</div><div class="ttdoc">Finalizes the decryption process and checks the authentication tag. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00130">EAX.cpp:130</a></div></div>
|
|
<div class="ttc" id="classBlockCipher_html_aed0788b25f6bb2f1bd47d5a5f0c5db33"><div class="ttname"><a href="classBlockCipher.html#aed0788b25f6bb2f1bd47d5a5f0c5db33">BlockCipher::encryptBlock</a></div><div class="ttdeci">virtual void encryptBlock(uint8_t *output, const uint8_t *input)=0</div><div class="ttdoc">Encrypts a single block using this cipher. </div></div>
|
|
<div class="ttc" id="classOMAC_html_ad496c7d2de4f22fd4192345003e75ee5"><div class="ttname"><a href="classOMAC.html#ad496c7d2de4f22fd4192345003e75ee5">OMAC::initNext</a></div><div class="ttdeci">void initNext(uint8_t omac[16], uint8_t tag)</div><div class="ttdoc">Initialises or restarts an OMAC hashing context. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8cpp_source.html#l00127">OMAC.cpp:127</a></div></div>
|
|
<div class="ttc" id="classOMAC_html_a6692d7f37dd097fdfdd2b198aa0d9cde"><div class="ttname"><a href="classOMAC.html#a6692d7f37dd097fdfdd2b198aa0d9cde">OMAC::update</a></div><div class="ttdeci">void update(uint8_t omac[16], const uint8_t *data, size_t size)</div><div class="ttdoc">Updates an OMAC hashing context with more data. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8cpp_source.html#l00143">OMAC.cpp:143</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_aad2c563f749535f539b8efbd74b09099"><div class="ttname"><a href="classEAXCommon.html#aad2c563f749535f539b8efbd74b09099">EAXCommon::encrypt</a></div><div class="ttdeci">void encrypt(uint8_t *output, const uint8_t *input, size_t len)</div><div class="ttdoc">Encrypts an input buffer and writes the ciphertext to an output buffer. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00100">EAX.cpp:100</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_afa88b0f589e09103e9c69ace081db0af"><div class="ttname"><a href="classEAXCommon.html#afa88b0f589e09103e9c69ace081db0af">EAXCommon::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Clears all security-sensitive state from this cipher. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00141">EAX.cpp:141</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_af5be5115c119610abb351028263d28de"><div class="ttname"><a href="classEAXCommon.html#af5be5115c119610abb351028263d28de">EAXCommon::setKey</a></div><div class="ttdeci">bool setKey(const uint8_t *key, size_t len)</div><div class="ttdoc">Sets the key to use for future encryption and decryption operations. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00071">EAX.cpp:71</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_ab5a61bba48561d6e7e6b8bafc51d91e3"><div class="ttname"><a href="classEAXCommon.html#ab5a61bba48561d6e7e6b8bafc51d91e3">EAXCommon::computeTag</a></div><div class="ttdeci">void computeTag(void *tag, size_t len)</div><div class="ttdoc">Finalizes the encryption process and computes the authentication tag. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00122">EAX.cpp:122</a></div></div>
|
|
<div class="ttc" id="classBlockCipher_html_a9a05307664469777592799c8f77397c4"><div class="ttname"><a href="classBlockCipher.html#a9a05307664469777592799c8f77397c4">BlockCipher::setKey</a></div><div class="ttdeci">virtual bool setKey(const uint8_t *key, size_t len)=0</div><div class="ttdoc">Sets the key to use for future encryption and decryption operations. </div></div>
|
|
<div class="ttc" id="classEAXCommon_html_abc6ccfb9338c94699458723f669513bf"><div class="ttname"><a href="classEAXCommon.html#abc6ccfb9338c94699458723f669513bf">EAXCommon::ivSize</a></div><div class="ttdeci">size_t ivSize() const </div><div class="ttdoc">Size of the initialization vector for this cipher, in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00059">EAX.cpp:59</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_acdf2c51fb11c068202311b5c95767db8"><div class="ttname"><a href="classEAXCommon.html#acdf2c51fb11c068202311b5c95767db8">EAXCommon::addAuthData</a></div><div class="ttdeci">void addAuthData(const void *data, size_t len)</div><div class="ttdoc">Adds extra data that will be authenticated but not encrypted. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00116">EAX.cpp:116</a></div></div>
|
|
<div class="ttc" id="classEAXCommon_html_a027956913eecfa0bc760f20f3b62df29"><div class="ttname"><a href="classEAXCommon.html#a027956913eecfa0bc760f20f3b62df29">EAXCommon::keySize</a></div><div class="ttdeci">size_t keySize() const </div><div class="ttdoc">Default size of the key for this cipher, in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00054">EAX.cpp:54</a></div></div>
|
|
<div class="ttc" id="classOMAC_html_abca82def496c6c6ab1ce5e5a958ec34a"><div class="ttname"><a href="classOMAC.html#abca82def496c6c6ab1ce5e5a958ec34a">OMAC::blockCipher</a></div><div class="ttdeci">BlockCipher * blockCipher() const </div><div class="ttdoc">Gets the block cipher that is in use for this OMAC object. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8h_source.html#l00034">OMAC.h:34</a></div></div>
|
|
<div class="ttc" id="classBlockCipher_html_afde6004a859e015d877eab3c37042a0f"><div class="ttname"><a href="classBlockCipher.html#afde6004a859e015d877eab3c37042a0f">BlockCipher::keySize</a></div><div class="ttdeci">virtual size_t keySize() const =0</div><div class="ttdoc">Default size of the key for this block cipher, in bytes. </div></div>
|
|
<div class="ttc" id="classOMAC_html_a0274138725ddf6240c030574bae3975c"><div class="ttname"><a href="classOMAC.html#a0274138725ddf6240c030574bae3975c">OMAC::initFirst</a></div><div class="ttdeci">void initFirst(uint8_t omac[16])</div><div class="ttdoc">Initialises the first OMAC hashing context and creates the B value. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8cpp_source.html#l00101">OMAC.cpp:101</a></div></div>
|
|
</div><!-- fragment --></div><!-- contents -->
|
|
<!-- start footer part -->
|
|
<hr class="footer"/><address class="footer"><small>
|
|
Generated on Sat Aug 27 2016 14:32:20 for ArduinoLibs by  <a href="http://www.doxygen.org/index.html">
|
|
<img class="footer" src="doxygen.png" alt="doxygen"/>
|
|
</a> 1.8.6
|
|
</small></address>
|
|
</body>
|
|
</html>
|